.channel-selector{padding:20px}.channel-selector h2{margin-bottom:20px;color:#333}.table-container{margin-bottom:20px;max-height:500px;overflow-y:auto;border:1px solid #ddd;border-radius:4px}.channel-selector table{width:100%;border-collapse:collapse;font-size:14px}.channel-selector th{background-color:#f5f5f5;padding:12px;text-align:left;font-weight:600;border-bottom:2px solid #ddd;position:sticky;top:0}.channel-selector td{padding:10px 12px;border-bottom:1px solid #eee}.channel-selector tr.group-row{background-color:#f0f0f0;font-weight:500}.controls{display:flex;gap:10px;justify-content:flex-end}.controls button{padding:10px 20px;border-radius:4px;cursor:pointer;background-color:#f5f5f5}.controls button:disabled{opacity:.6;cursor:not-allowed}.controls button:last-child:not(:disabled){background-color:#4caf50;color:#fff}*{box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f5f5f5;color:#333}.app{max-width:1200px;margin:0 auto;padding:20px}.app.auth-page{display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;gap:20px}.app.auth-page input{width:300px;padding:10px;font-size:16px}header{background:#fff;padding:20px;border-radius:8px;margin-bottom:20px;box-shadow:0 2px 4px #0000001a}header h1{margin:0 0 20px}nav{display:flex;gap:10px}nav button{padding:8px 16px;background:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:14px}nav button:hover{background:#0056b3}nav button.active{background:#0056b3}main{background:#fff;padding:20px;border-radius:8px;box-shadow:0 2px 4px #0000001a}.form-group{margin-bottom:20px}.form-group label{display:flex;gap:10px;align-items:center;margin-bottom:10px}.form-group input[type=text],.form-group input[type=url],.form-group input[type=file],.form-group input[type=password]{flex:1;padding:8px;border:1px solid #ddd;border-radius:4px;font-size:14px}button[type=submit],button[type=button]{padding:10px 20px;background:#28a745;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:14px}button[type=submit]:hover,button[type=button]:hover{background:#218838}button[type=submit]:disabled{background:#ccc;cursor:not-allowed}.error{color:#d32f2f;padding:10px;background:#ffebee;border-radius:4px;margin-top:20px}.success{color:#388e3c;padding:20px;background:#e8f5e9;border-radius:4px;margin-top:20px}.success h2{margin-top:0}.success a{color:#388e3c;text-decoration:underline}.channel-list table{width:100%;border-collapse:collapse;margin-top:20px}.channel-list th,.channel-list td{text-align:left;padding:12px;border-bottom:1px solid #ddd}.channel-list th{background:#f5f5f5;font-weight:600}.channel-list tr:hover{background:#f9f9f9}.channel-list a{color:#007bff;text-decoration:none}.channel-list a:hover{text-decoration:underline}.channel-list img{max-height:40px;object-fit:contain}